You can find it on Route 3, about 10% of the time.
route 3or4
Breed Jigglypuff/Wigglytuff
You can breed jigglypuff or wigglytuff to get it.
Use a moon stone on it.
It's not hypnosis, but it lulls Pokemon to sleep. It is, the move Sing. Jigglypuff knows it, and you can get it by ''accident'' by using Metronome.
Clefairy, Jigglypuff. Umbreon. etc.
Yes.
Clefairy, Jigglypuff, Nidorina, Nidorino
It evolves jigglypuff, clefairy, nidorino, nidorina and skitty.
There are a few Jigglypuff in Route 3.
Catch a Jigglypuff and a Ditto or catch both male and female Jigglypuff and bring them to the fourth island in the Sevii archipelago. You'll find a day-care center there. Of course, you'll need to complete the Elite four challenge before getting there.
jigglypuff in Pokemon firered.mont moon and near mount moon